Block magnet



FIG. 1 is a top perspective view showing my new design;

FIG. 2 is a front view, the rear view being a mirror image thereof;

FIG. 3 is a right elevational view, the left elevational view being amirror image thereof;

FIG. 4 is a plan view thereof; and,

FIG. 5 is a bottom view thereof.

The ornamental design for a “block magnet”, as shown and described.